CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 339

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Floppy Port Register Descriptions
6.7
The registers for the Floppy Port are divided into two sets:
• Standard GeodeLink Device (GLD) MSRs (Shared with
• Floppy Port Specific MSRs
The MSRs are accessed via the RDMSR and WRMSR pro-
cessor instructions. The MSR address is derived from the
6.7.1
6.7.1.1
MSR Address
Type
Reset Value
6.7.1.2
MSR Address
Type
Reset Value
AMD Geode™ CS5535 Companion Device Data Book
MSR Address
DIVIL, see Section 6.6.1 "Standard GeodeLink™ Device
(GLD) MSRs" on page 317.)
51400030h
51400031h
51400032h
51400033h
Bit
7:0
7
7
Floppy Port Register Descriptions
Floppy Port Specific MSRs
Floppy Port 3F2h Shadow (FLPY_3F2_SHDW)
Floppy Port 3F7h Shadow (FLPY_3F7_SHDW)
Name
FLPY_PORT_3F2
_VAL
Type
RO
RO
RO
RO
51400030h
RO
xxh
51400031h
RO
xxh
6
6
Register Name
Floppy Port 3F2h Shadow (FLPY_3F2_SHDW)
Floppy Port 3F7h Shadow (FLPY_3F7_SHDW)
Floppy Port 372h Shadow (FLPY_372_SHDW)
Floppy Port 377h Shadow (FLPY_377_SHDW)
Table 6-19. Floppy Port Specific MSRs Summary
Description
Floppy Port Shadow Register Value Last Written to I/O Port 3F2h. Required for
support of FDC power ON/OFF and Zero Volt Suspend/Resume coherency.
This register is a copy of an I/O register that cannot safely be directly read. Value in reg-
ister is not deterministic of when the register is being read. It is provided here to assist
in a Save-to-Disk operation.
5
5
FLPY_3F2_SHDW Bit Descriptions
FLPY_3F2_SHDW Register Map
FLPY_3F7_SHDW Register Map
FLPY_PORT_3F2_VAL
FLPY_PORT_3F7_VAL
4
4
perspective of the CPU Core. See Section 4.2 "MSR
Addressing" on page 59 for more details.
All MSRs are 64 bits, however, the Floppy Port Specific
MSRs are called out as 8 bits. The Floppy Port treats
writes to the upper 56 bits (i.e., bits [63:8]) of the 8-bit
MSRs as don’t cares and always returns 0 on these bits.
Table 6-19 summarizes the Floppy Port Specific MSRs.
The reference column in the tables point to the page where
the register maps and bit descriptions are listed.
3
3
2
2
Reset Value
31506B
xxh
xxh
xxh
xxh
1
1
Reference
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